How to know the special character?

I use the Release 10.2.0.1.0 Oracle version. I have a special character, but I suspect it as any other language caharacter.
His appearance in my "quick editor/Sql TOAD Editor" as "has? but when I'm selecting from the table to aid under application, her gives "no rows returned.

Select the tab1 id where id like 'a % ';

Please let me know, how can I be able to see the exact character or what Publisher will allow me to see the character?
I think the sql GUI developer might be able to show the same, but I don't have Developer sql with me.

930254 wrote:
I use the Release 10.2.0.1.0 Oracle version. I have a special character, but I suspect it as any other language caharacter.
His appearance in my "quick editor/Sql TOAD Editor" as "has? but when I'm selecting from the table to aid under application, her gives "no rows returned.

Select the tab1 id where id like 'a % ';

Please let me know, how can I be able to see the exact character or what Publisher will allow me to see the character?
I think the sql GUI developer might be able to show the same, but I don't have Developer sql with me.

Select ASCIISTR (id) in tab1 where id like 'a % ';

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